A decoction of the plant is antispasmodic, astringent, febrifuge and vulnerary.Guava exhibits antibacterial action against intestinal pathogens such as Staphylococcus.All parts of the young fruit are astringent.The dried ripe fruits are recommended as a remedy for dysentery, while the leaves and fruits are used as a cure for diarrhoea.The ripe, fresh fruit is eaten as a cure for constipation.Water from soaking the fruit is good to treat diabetes.The clear fruit juice has been recommended as a treatment for hepatitis, gonorrhoea, and diarrhoea.

Compounds in the leaves have shown antidiabetic activityThe leaves are used as a treatment for diarrhoea, coughs, stomach ache and dysentery.The leaves are pounded, squeezed in salt water and the solution is used to treat toothaches.A decoction of the leaves or bark is taken externally as a lotion for skin complaints, ringworm, wounds, and ulcers.